Cap: 3-9 cm; convex, becoming broadly convex or nearly flat; dry; smooth or finely velvety; margin even; brownish to yellowish brown, reddish brown, or cinnamon.
Pore Surface: Yellow, becoming olive yellow or brownish yellow with maturity; not bruising; pores primarily angular, 1-2 mm wide; tubes to 16 mm deep.
Stem: 3-9 cm long; 0.5-1.5 cm thick; often tapered downward; dry; solid and tough; widely and coarsely reticulate near the apex (and often for half—or more—of the stem’s length); whitish to pale brownish; basal mycelium whitish to yellowish.
Flesh: Pale yellow; not staining on exposure.
Odor and Taste: Not distinctive.
Chemical Reactions: Ammonia flashing blue-green on cap, then resolving to brownish with a greenish ring; negative on flesh. KOH dark brown on cap; negative on flesh. Iron salts bluish gray on cap; bluish gray on flesh.
Spore Print: Olive to olive brown.
Microscopic Features: Spores 10-14 × 4-5 µ; smooth; subfusiform. Pileipellis a trichoderm of tangled hyphae 4-12 µ wide, with scattered or frequent inflated and round elements 12-17 µ wide.